/// 定义应用的间距设计规范
/// 基于 4pt 网格系统
/// 通过倍数来定义不同的间距等级
/// 适合 padding/margin/gap 等场景
class SpacingTokens {
  static const double none = 0.0;
  static const double tiny = 2.0;
  static const double base = 4.0;
  static const double xs = 8.0;
  static const double sm = 12.0;
  static const double md = 16.0;
  static const double lg = 24.0;
  static const double xl = 32.0;
  static const double xxl = 40.0;
}


